Consider the following equations:

1.The equation 1990x-173y=11 has no solution in integers for x and y

2.The equation 3x-12y=7 has no solution in integers for x and y

Which of the above statements are correct?

What is the reaminder obtained when 1421*1423*1425 is divided by 12

The square root of (0.75)³/(1-0.75)+[0.75 + (0.75)² +1] is

What is 5+√10/(5√5-2√20-√32+√50)

For what value of k is (x-5) is  a factor of x³-3x²+kx-10?

If 37/13=2+ (1/(x+(1/(y+1/z)))) where x,y and z are natural numbers what is the value of z